CVE-2026-20665 Details
Description
This issue was addressed through improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. Processing maliciously crafted web content may prevent Content Security Policy from being enforced.
A vulnerability in WebKit, the engine used by Safari, has been identified that allows processing of maliciously crafted web content in a way that bypasses the Same Origin Policy. This issue is present in WebKit versions included with Safari 26.4, iOS 18.7.7, iPadOS 18.7.7, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, and watchOS 26.4. The vulnerability arises from inadequate input validation, which can be exploited to manipulate cross-origin interactions.
Users can update to Safari 26.4, iOS 18.7.7, iPadOS 18.7.7, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, or watchOS 26.4 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 25, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://support.apple.com/en-us/126792 | [email protected] | Release NotesVendor Advisory |
| https://support.apple.com/en-us/126793 | [email protected] | Release NotesVendor Advisory |
| https://support.apple.com/en-us/126794 | [email protected] | Release NotesVendor Advisory |
| https://support.apple.com/en-us/126797 | [email protected] | Release NotesVendor Advisory |
| https://support.apple.com/en-us/126798 | [email protected] | Release NotesVendor Advisory |
| https://support.apple.com/en-us/126799 | [email protected] | Release NotesVendor Advisory |
| https://support.apple.com/en-us/126800 | [email protected] | Release NotesVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-693 | Protection Mechanism Failure | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| apple safari | < 26.4 |
CPE
Remediation
| |
| apple ipados | < 18.7.7 >= 26.0, < 26.4 |
CPE
Remediation
| |
| apple iphone os | < 18.7.7 >= 26.0, < 26.4 |
CPE
Remediation
| |
| apple macos | < 26.4 |
CPE
Remediation
| |
| apple tvos | < 26.4 |
CPE
Remediation
| |
| apple visionos | < 26.4 |
CPE
Remediation
| |
| apple watchos | < 26.4 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 25, 2026 | Initial Analysis | [email protected] |
| Mar 25, 2026 | CVE Modified | CISA-ADP |
| Mar 25, 2026 | New CVE Received | [email protected] |